<template>
  <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
         <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
         <el-breadcrumb-item>权限管理</el-breadcrumb-item>
         <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
       <!-- 卡片视图 -->
      <el-card>
          <!-- 添加角色按钮区域 -->
          <el-row>
              <el-col>
                  <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
              </el-col>
          </el-row>
          <!-- 角色列表区域 -->
          <el-table :data="rolelist" border stripe>
              <!-- 展开列 -->
              <el-table-column type="expand">
                  <template slot-scope="scope">
                      <el-row :class="['bdbottom', i1 === 0 ? 'bdtop': '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                          <!-- 渲染一级权限 -->
                          <el-col :span="5">
                              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                          </el-col>
                          <!-- 渲染二级和三级权限 -->
                          <el-col :span="19">
                              <!-- 通过for循环嵌套渲染二级权限 -->
                              <el-row :class="[i2 === 0 ? '': 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                  <el-col :span="6">
                                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                      <i class="el-icon-caret-right"></i>
                                  </el-col>
                                  <el-col :span="18">
                                      <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                  </el-col>
                              </el-row>
                          </el-col>
                      </el-row>
                      <pre>
                          {{scope.row}}
                      </pre>
                  </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column label="#" type="index"></el-table-column>
              <el-table-column label="角色名称" prop="roleName"></el-table-column>
              <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
              <el-table-column label="操作">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
              </el-table-column>
          </el-table>
      </el-card>
      <!-- 添加角色的对话框 -->
      <el-dialog
       title="添加角色"
       :visible.sync="addDialogVisible"
       width="50%"
       @close="addDialogClosed">
          <!-- 内容主体区域 -->
          <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
              <el-form-item label="角色名称" prop="roleName">
                  <el-input v-model="addForm.roleName"></el-input>
              </el-form-item>
              <el-form-item label="角色描述" prop="roleDesc">
                  <el-input v-model="addForm.roleDesc"></el-input>
              </el-form-item>
          </el-form>
          <!-- 底部区域 -->
          <span slot="footer" class="dialog-footer">
              <el-button @click="addDialogVisible = false">取 消</el-button>
              <el-button type="primary" @click="addUser">确 定</el-button>
          </span>
      </el-dialog>
      <!-- 修改角色的对话框 -->
      <el-dialog
       title="修改角色"
       :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
               <el-form-item label="角色名称" prop="roleName">
                   <el-input v-model="editForm.roleName"></el-input>
               </el-form-item>
               <el-form-item label="角色描述" prop="roleDesc">
                   <el-input v-model="editForm.roleDesc"></el-input>
               </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
               <el-button @click="editDialogVisible = false">取 消</el-button>
               <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
      </el-dialog>
      <!-- 分配权限的对话框 -->
      <el-dialog
       title="分配权限"
       :visible.sync="setRightDialogVisible"
       width="50%"
       @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" 
            :props="treeProps" 
            show-checkbox 
            node-key="id" 
            default-expand-all 
            :default-checked-keys="defKeys"
            ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                 <el-button @click="setRightDialogVisible = false">取 消</el-button>
                 <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
      </el-dialog>
  </div>
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightslist: [],
            // 控制添加角色对话框的显示与隐藏
            addDialogVisible: false,
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId: '',
            // 添加角色的表单数据
            addForm: {
                roleName: "",
                roleDesc: ""
            },
            // 添加表单的验证对象规则
            addFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名称',trigger: 'blur'}
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述',trigger: 'blur'}
                ]
            },
            // 控制修改角色对话框的显示与隐藏
            editDialogVisible: false,
            // 查询到的角色信息对象
            editForm: {},
            // 添加表单的验证对象规则
            editFormRules: {
                roleName: [
                    { required: true, message: '请输入角色名称',trigger: 'blur'}
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述',trigger: 'blur'}
                ]
            }
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }
            this.rolelist = res.data
            console.log(this.rolelist);
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRef.resetFields()
        },
        // 点击按钮,添加新用户
        addUser() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                // 发起添加角色的网络请求
                const {data: res} = await this.$http.post('roles',this.addForm)
                if (res.meta.status !== 201) {
                    this.$message.error('添加角色失败!')
                }
                this.$message.success('添加角色成功!')
                // 隐藏添加用户的对话框
                this.addDialogVisible = false
                // 重新获取用户列表数据
                this.getRolesList()
            })
        },
        // 展示编辑角色的对话框
        async showEditDialog(id) {
            const {data: res} = await this.$http.get('roles/' + id)
            if (res.meta.status !==200) {
                return this.$message.error('查询角色信息失败')
            }
            this.editForm = res.data
            this.editDialogVisible = true
            // console.log(id);
        },
        // 监听修改角色对话框的关闭事件
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        // 修改角色信息并提交
        editUserInfo() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                // 发起修改角色的网络请求
                const {data: res} = await this.$http.put('roles/' + this.editForm.id, {
                    roleName: this.editForm.roleName, 
                    roleDesc: this.editForm.roleDesc
                    })
                if (res.meta.status !== 200) {
                    this.$message.error('修改角色信息失败!')
                }
                // 隐藏修改角色的对话框
                this.editDialogVisible = false
                // 重新获取角色列表数据
                this.getRolesList()
                this.$message.success('修改角色信息成功!')
            })
        },
        // 根据id删除对应的角色信息
        async removeRoleById(id) {
            // 弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            // 如果用户确认删除，则返回值为字符串 confirm
            // 如果用户取消删除，则返回值为字符串 cancel
            // console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            // console.log('确认了删除');
            const { data: res } = await this.$http.delete('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('删除角色失败!')
            }
            this.$message.success('删除角色成功!')
            this.getRolesList()
        },
        // 根据id删除对应的权限
        async removeRightById(role, rightId) {
            // 弹框提示用户是否删除
             const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
              confirmButtonText: '确定',
              cancelButtonText: '取消',
              type: 'warning'
             }).catch(err => err)
             if(confirmResult !== 'confirm') {
                 return this.$message.info('取消了删除!')
             }
             const { data: res } = await this.$http.delete(
                 `roles/${role.id}/rights/${rightId}`
             )
             if (res.meta.status !== 200) {
                 return this.$message.error('删除权限失败!')
             }
            //  this.getRolesList()
            role.children = res.data
             
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限的数据
            const { data: res} = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限失败!')
            }
            // 把获取到的权限数据保存到 data 中
            this.rightslist = res.data
            console.log(this.rightslist);
            // 递归获取三级节点的id
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true
        },
        // 通过递归的方式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
        getLeafKeys(node, arr) {
            // 如果当前的 node 属性节点不包含 children 属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const { data: res} = await this.$http.post(`roles/${this.roleId}/rights`,{ rids: idStr})
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>